"High School DxD" is a popular Japanese light novel series turned anime, and while there isn't a "High School DxD2" per se, the second season of the anime adaptation titled "High School DxD Season 2" was released in 2015. This season continues the story of Issei Hyodo, an underdog high school student who is turned into a devil. It delves deeper into the supernatural world filled with devils, fallen angels, and gods, as Issei trains to become stronger and protect his friends. The season introduces more characters and explores complex relationships and conflicts, enhancing the adventurous and romantic elements that fans love. It's a must-watch for anyone interested in action-packed fantasy anime with a mix of humor and drama.